Carbiage-jack



UNITED STATES PATENT OFFICE.

JOHN J. PIKE, OF CHELSEA, MASSACHUSETTS.

CARRIAGE-J ACK.

Specification of Letters Patent No. 30,346, dated October 9, 1860.

T o all whom it may concern.'

Be it known that I, JOHN J. Plxn, of Chelsea, in the county of Suiollrand State of Massachusetts, have invented a new and useful or ImprovedCarriage-J ack, and do hereby declare the same to be fully described inthe following specification and illustrated in the accompanyingdrawings, of which- Figure l, is a top view, Fig. 2, a side elcvation,Fig. 3, a longitudinal and vertical section and Eig. 4, a transverse andvertical section of it, the latter figure being so taken as to exhibitthe arrangement of the lever catches by which the lifting lever of thejack is maintained either at its highest or at its lowest position.

In the drawings A, denotes a frame co1n posed of a bed plate a, and twopairs of standards or posts b, b, c, c', they being arranged asrepresented. The two front posts b, support the fulcrum pin CZ, of alifting lever B, which is placed between them and the parts 0, c.

The lower end of a notched bearing bar or lever C, rests on the inferioror lower arm of the lever B, while the said bar C, is arranged at anacute angle with the lever B, and extends between the two posts of eachpair b, b or c, c and is supported by a fulcrum or pin e, passed throughthe two posts c, c and such bar C.

The bar C, is constructed with a series of seats or right angularnotches f, f, f, arranged along its upper surface as shown in thedrawings. Furthermore a screw g, is not only passed upward through theslot h, of a cap plate z', (which is fastened to the upper surface ofthe smaller arm of the lever B, and formed as shown more particu'- larlyin Fig. 5, which is a top view of the level' B,) but screwed into thelever C,and with the plate z', serves to connect the two levers in suchmanner as to cause the front end of the lever C, to move either upwardor downward with that of the lever B, while the latter is being turnedon its t'ulcruni.

Two lever stops 71e, Z, formed as shown in Fig. 4l, are applied to theinner side of one of the posts c, c', by means of two ulcra m, a,projecting from the' post. The opposite ends of the longer stop l, arebifurcated,

i the outermost prong of the upper fork being longer than its innerprong, the lower arm of the upper lever stop k, extends into the fork ofthe upper arm of the stop l, while the fork of the lower arm receives aspring 0, alixed to the post c. Then the lever B, is depressed so as torest on a pin p, extending through the posts c, c the said spring o,will cause the longer stop to extend over the lever so as to estop itfrom being elevated, so when the lever B, is raised to itshighestposition (that is up against the lever C,) the upper stop by theaction of the spring. and the lower stop, will be forced to projectunderneath the lever in such manner as to retain it in its highestposition. By pressing inward the upper arm of the lower lever stop bothlever stops may be moved simultaneously on their fulcra and so as tocarry either the upper arm of the upper stop, or the lower arm of thelower stop away from the lever B, as circumstances may require inorder-to enable such lever to be either raised or lowered on itsfulcruni.

By means of the notched bar or lever C, constructed arranged and appliedto the frame A, and the lever B, in manner as specified the carriagejack can be readily ad justed to the axle of any vehicle preparatory tothe raising of such axle with the jack. To accomplish the adaptation ofthe jack to an. axle, the former is to be pressed forward under thelatter until the axle may enter one of the notches of the bar C. Thishaving been done, the rear end of the lever B, is to be depressed. Thiswill elevate the lever C, and the axle resting on it.

The advantage of my improved jack over that having one lever only (whichof necessity must have means of adjusting its fulcrum in order that thelever may be properly applied to a carriage) is to be found not only inthe case by which it may be adapted to an axle, but in the increasedleverage which is applied by itin order to eiiiect the elevation of theaxle. I therefore do not claim a carriage jack as constructedl with butone lever, Jfurnished with an adjustable fulcrum, but

I claim- 1. My improved carriage jack as constructed With the eXtrabearing lever C,c01n- X pin p, With the levers B, and C, applied binedand arranged With the lifting lever Within the frame A, and With respectto B, and the supporting frame A, substanl one another as specified.tially in manner and so as to operate as here- 5 inbefore described.Witnesses:

2. The combination and arrangement of R. H. EDDY, the tWo springstopping levers la, Z, and the F. P. HALE, J r.

JOHN J. PIKE..

